queryform.vb

这是一个实用的学生名册管理系统

Public Class QueryForm
    Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        '该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 调用之后添加任何初始化

    End Sub

    '窗体重写处置以清理组件列表。
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    '注意：以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改此过程。
    '不要使用代码编辑器修改它。
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Edit查询依据 As System.Windows.Forms.TextBox
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents CmbBox查询依据 As System.Windows.Forms.ComboBox
    Friend WithEvents CmbBox排序依据 As System.Windows.Forms.ComboBox
    Friend WithEvents CmbBox运算符 As System.Windows.Forms.ComboBox
    Friend WithEvents Edit数值 As System.Windows.Forms.TextBox
    Friend WithEvents Btn查询 As System.Windows.Forms.Button
    Friend WithEvents Btn取消 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label1 = New System.Windows.Forms.Label()
        Me.Edit查询依据 = New System.Windows.Forms.TextBox()
        Me.Label2 = New System.Windows.Forms.Label()
        Me.CmbBox查询依据 = New System.Windows.Forms.ComboBox()
        Me.CmbBox排序依据 = New System.Windows.Forms.ComboBox()
        Me.CmbBox运算符 = New System.Windows.Forms.ComboBox()
        Me.Edit数值 = New System.Windows.Forms.TextBox()
        Me.Btn查询 = New System.Windows.Forms.Button()
        Me.Btn取消 = New System.Windows.Forms.Button()
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.Font = New System.Drawing.Font("宋体", 10.5!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label1.Location = New System.Drawing.Point(22, 40)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(77, 16)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "查询依据："
        '
        'Edit查询依据
        '
        Me.Edit查询依据.Font = New System.Drawing.Font("宋体", 10.5!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Edit查询依据.Location = New System.Drawing.Point(24, 64)
        Me.Edit查询依据.Name = "Edit查询依据"
        Me.Edit查询依据.Size = New System.Drawing.Size(72, 23)
        Me.Edit查询依据.TabIndex = 1
        Me.Edit查询依据.Text = ""
        '
        'Label2
        '
        Me.Label2.AutoSize = True
        Me.Label2.Font = New System.Drawing.Font("宋体", 10.5!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label2.Location = New System.Drawing.Point(24, 112)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(77, 16)
        Me.Label2.TabIndex = 2
        Me.Label2.Text = "排序依据："
        '
        'CmbBox查询依据
        '
        Me.CmbBox查询依据.Font = New System.Drawing.Font("宋体", 10.5!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.CmbBox查询依据.Location = New System.Drawing.Point(120, 32)
        Me.CmbBox查询依据.Name = "CmbBox查询依据"
        Me.CmbBox查询依据.Size = New System.Drawing.Size(121, 22)
        Me.CmbBox查询依据.TabIndex = 4
        '
        'CmbBox排序依据
        '
        Me.CmbBox排序依据.Font = New System.Drawing.Font("宋体", 10.5!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.CmbBox排序依据.Location = New System.Drawing.Point(120, 104)
        Me.CmbBox排序依据.Name = "CmbBox排序依据"
        Me.CmbBox排序依据.Size = New System.Drawing.Size(121, 22)
        Me.CmbBox排序依据.TabIndex = 5
        '
        'CmbBox运算符
        '
        Me.CmbBox运算符.Font = New System.Drawing.Font("宋体", 10.5!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.CmbBox运算符.Items.AddRange(New Object() {">", ">=", "<", "<=", "=", "<>", "Like", "In"})
        Me.CmbBox运算符.Location = New System.Drawing.Point(120, 64)
        Me.CmbBox运算符.Name = "CmbBox运算符"
        Me.CmbBox运算符.Size = New System.Drawing.Size(48, 22)
        Me.CmbBox运算符.TabIndex = 6
        '
        'Edit数值
        '
        Me.Edit数值.Font = New System.Drawing.Font("宋体", 10.5!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Edit数值.Location = New System.Drawing.Point(176, 64)
        Me.Edit数值.Name = "Edit数值"
        Me.Edit数值.Size = New System.Drawing.Size(64, 23)
        Me.Edit数值.TabIndex = 7
        Me.Edit数值.Text = ""
        '
        'Btn查询
        '
        Me.Btn查询.DialogResult = System.Windows.Forms.DialogResult.OK
        Me.Btn查询.Font = New System.Drawing.Font("宋体", 10.0!)
        Me.Btn查询.Location = New System.Drawing.Point(24, 152)
        Me.Btn查询.Name = "Btn查询"
        Me.Btn查询.Size = New System.Drawing.Size(75, 24)
        Me.Btn查询.TabIndex = 8
        Me.Btn查询.Text = "查  询"
        '
        'Btn取消
        '
        Me.Btn取消.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.Btn取消.Font = New System.Drawing.Font("宋体", 10.0!)
        Me.Btn取消.Location = New System.Drawing.Point(168, 152)
        Me.Btn取消.Name = "Btn取消"
        Me.Btn取消.Size = New System.Drawing.Size(75, 24)
        Me.Btn取消.TabIndex = 9
        Me.Btn取消.Text = "取  消"
        '
        'QueryForm
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(272, 205)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Btn取消, Me.Btn查询, Me.Edit数值, Me.CmbBox运算符, Me.CmbBox排序依据, Me.CmbBox查询依据, Me.Label2, Me.Edit查询依据, Me.Label1})
        Me.Name = "QueryForm"
        Me.Text = "QueryForm"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Dim DataType(100) As Integer
    Dim SqlString As String
    Dim OrderString As String
    Dim QueryString As String

    Private Sub Btn查询_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btn查询.Click
        Select Case DataType(Me.CmbBox查询依据.SelectedIndex)
            Case 1, 4, 5
                SqlString = "SELECT * FROM 学生信息 INNER JOIN 原学历 ON 学生信息.学号 =原学历.学号 Where "
                SqlString = SqlString + Me.Edit查询依据.Text + " " + Me.CmbBox运算符.Text + " " + "(" + Me.Edit数值.Text + ")"
            Case 10
                SqlString = "SELECT * FROM 学生信息 INNER JOIN 原学历 ON 学生信息.学号 =原学历.学号 Where "
                SqlString = SqlString + Me.Edit查询依据.Text + " " + Me.CmbBox运算符.Text + " " + "'" + Me.Edit数值.Text + "'"
            Case 8
                SqlString = "SELECT * FROM 学生信息 INNER JOIN 原学历 ON 学生信息.学号 =原学历.学号 Where "
                SqlString = SqlString + Me.Edit查询依据.Text + Me.CmbBox运算符.Text + "CDate(" + Me.Edit数值.Text + ")"
        End Select
        OrderString = Me.CmbBox排序依据.Text
        QueryData(SqlString, OrderString)
    End Sub

    Sub QueryData(ByVal SqlString As String, ByVal OrderString As String)
        QueryString = SqlString
        If OrderString <> "" Then
            QueryString = SqlString + " Order By " + OrderString
        End If
        TestRS = TestDB.OpenRecordset(QueryString)
    End Sub

    Private Sub QueryForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim i As Integer
        For i = 0 To TestRS.Fields.Count - 1
            DataType(i) = TestRS.Fields(i).Type
        Next
    End Sub

    Private Sub CmbBox查询依据_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CmbBox查询依据.SelectedIndexChanged
        Me.Edit查询依据.Text = Me.CmbBox查询依据.Text
    End Sub

End Class